国家规定:电气化铁道牵引负荷在牵引变电所牵引变压器高压侧的月平均功率因数应达到()以上。
参考答案:0.90
This is the last time I ______ Shanghai. I still remember the first time I ______ there was in 2005.
A.have visited, went
B.had visited, went
C.visited, had gone
D.had visited, had gone
女,67岁,主诉外阴肿物脱出半年,可还纳,内裤带血1个月。出血最可能的原因是()
A.外阴癌
B.宫颈癌
C.绝经后出血,应除外子宫内膜病变
D.子宫脱垂Ⅱ度以上,伴宫颈炎症、溃疡
E.老年性 * * 炎